Bring a large pot of salted water to a boil. Add the manicotti tubes and cook until al dente, about 6–8 minutes; drain in a colander and rinse under cool water.
Toss the drained tubes with 2 teaspoons olive oil to prevent sticking and set aside.
Preheat the oven to 400°F (200°C).
In a mixing bowl, combine the drained ricotta, 1 cup mozzarella, Parmesan, Italian seasoning, chopped parsley, chopped basil, salt, and pepper until well blended.
Fill each manicotti tube with the cheese mixture using a piping bag or a spoon.
Spread 1 1/4 cups of marinara sauce evenly over the bottom of a 9×13-inch baking dish. Arrange the filled tubes over the sauce and pour the remaining marinara sauce over them. Sprinkle extra mozzarella on top.
Cover the dish with foil and bake for 30 minutes. Remove the foil and bake uncovered for 10 more minutes, until cheese is bubbly and lightly browned.
Let the baked manicotti cool for a few minutes, garnish with additional basil, and serve.